Car-roof.



W. n. THGMSON,

GAB R00?. 4

APPLIUATNN FILED 0011s. 1910.

' 'Patented June 30, 1914.

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, jz rap 717/ 7417/522523@ mensa.

"WILLIAIYI D. THOMPSON, OF DETROIT, MICHIGAN, ASSIGNDR TO HUTCHINS CAB RQGFING Cf PANY, OF DETROT, MICHIGAN, A CORPORATION 0F MICHIGAN.

Specification of Letters Patent.

Patented on e 30, NH4.

Application led October i3, 1910. Serial No. 586,854.

lle it known that l. 'illumini l), '.`HoMP-I son'. a citizen of lhe liniicd States ot Anieiea, residing at 'Detroitl` in the County of lVayne :ind State oi lilichin'an, hnve inyent ed eci-tain new and nselfnl improvements in Car-Roots, oi which the following' a speci.

.lication` reference heine' had therein to the acr'oinlmnying drawings.

y'lhe invention relates to var roots, more particularly to the c 'trut-tion oi' the cai" lines and inerme lor .sewn-ing: the saine to the pni'lins, hereinafter set forth.

ln the drawinns-Figure l is a cross lion through 'the ar root. Fig. 2 is a seetional perspective View oi one of the carlines. Fig. 3 is a cross section of the cai-line on line @1MM i", l. Fig. -lis a sectional perspeetiye View oi theenrline viewed troni the inner side.

My improved root structure comprises carline booms which are formed np from sheet metal.

lt is an object of the invention to secure the nnixinnnn strength with a niiniinuin depth or thickness to the roof structure, to this end the onrlines are foi-ined as :follows: ln cross section the heain has a central -in-, rerted U shaped portion A which che full depth ot the root'. and upon opposite sides of this ventral portion are reverselyv lient. U portions ll extending only a part of vthe depth of the Central portion. and preferably terminating in 'outwardly extendi.. horizontal flange' portions C. At the point in the length o? the heani atwhieh the pnrlins cross. the reversely lient U portions are flattened into n plane adjacent to the lianges C, thereby foi-inno; a recess D for'reeeirlng the pnrlins. This recess is preteraloljY of dept-h eqnelto the thickness of the purhn so that the latter is confined within the vertical .space limits of the Carlino v 'lhe cai-line constructed as described is adapted to supportthe roofing plates (not shown) upon the flanges C, and thesel flanges are in substantially the plane of the upper ltace of the purlins, which latter also support the roof plates, thus the whole structure is.

limited in depth. to the vertical section of the earline. v

lVhnt I claim as my invention is,-

1. lna carlroof, a carline formed from sheet metal with a longitudinal central return-lient portion the full depth of the roof, and an adjacent oppositely bent portion of the depth of the pui-lin, said oppositely bent 'por-tionbeingflattened at one point to form point of interseetion with the purlin to form a recess for reeeiving'the latter.

3. in a cer roof, a earline formed of sheet metal, comprising n central inverted troughshaped portion, adjacentl oppositely bent trough-shaped portiom` extending only a part of the depth of said central 'portion and terniinating in outwardly extending horizontall llanges, the section of Said beam helow said horizontal flanges beingI flattened at the point ot intersection with the pnrlin to forni ii, recess for receiving the latter.

e. ln a ear roof. a oai-line formed from sheet metal having a longitudinal central return-bent portion, oppositely return-bent v outer portions extending only a part of the depth of the central portion and terminating in outwardly extending horizontal portions, said return-bent portions havingr a pin-t thereof flattened into a plano adjacent the outwardly extending horizontal port-ions.

in testimony whereof I atlix my signature, in presence of two witnesses.

WILLIAM l). TI'IOMTSON. Witnesses:

' W. J.. BELKNAP,

JAMES P. BARRY.' 

